simpy
simpy
SD (software-defined) radio receivers use a bare minimum of hardware, relying instead on their software capabilities. This SDR project demonstrates what’s achievable, in this case a multi-purpose receiver covering all bands from 150 kHz to 30 MHz. It’s been optimised for receiving DRM and AM broadcasts but is also suitable for listening in to the world of amateur transmissions.
www.nti-online.de/diraboxsdr.htm
www.sdradio.org
sourceforge.net/projects/drm
www.g8jcf.dyndns.org
Key Phrases - Statistically Improbable Phrases (SIPs): (learn more) restart protection, space sextant, digital autopilot, landing radar, program alarms, rendezvous radar, reaction thrusters, scanning telescope, braking phase, inertial platform, descent engine, human spaceflight, powered descent, erasable memory, pilot opinion, gimbal lock, descent stage, abort button, flying qualities, guidance computer Key Phrases - Capitalized Phrases (CAPs): (learn more) Neil Armstrong, North American, World War, Age of Systems, Chris Kraft, David Scott, Jack Garman, Space Task Group, Michael Collins, Scott Crossfield, Robert Chilton, Project Apollo, Edwards Air Force Base, Joe Shea, Aaron Cohen, Alan Shepard, Don Eyles, Draper Laboratories, Floyd Bennett, Eldon Hall, Charlie Duke, Mission Control, Deke Slayton, United States, Mercury Seven
Most custom steel rule dies are likely to run easily in the $50 to $100 range. Larger and more complex dies than the heart example below easily run several hundred dollars for a 1 up die. Actually cutting your project will range also in the $50 to $150 range per batch up to 1,000 units. There may also be additional design fees or prototyping fees required depending on the project. If that hasn't scared you off, you are ready to investigate a custom job involving a custom steel rule die.
We highly recommend you investigate your local craft store or scrapbooking club to see if they have some of the hobby die cutting tools that might meet your needs.
To decode what the remote was sending, I used an oscilloscope and a small photodiode. The photodiode generates a small amount of voltage when light hits it, and responds to changes in light level quickly enough that the oscilloscope can draw a really nice plot of the signal. I have a Parallax USB oscilloscope, which is perfect for showing the command pulses and is just fast enough to find the modulation frequency. As an aside, I’m really happy with the Parallax oscilloscope for projects like this. It is simple to use and I love being able to save images to share with people.
Here’s what two of the commands from the dimmer remote look like. The top signal is the “fade lights up” command, and the bottom one is “fade lights down”:
Those of us who tend the land set about to planting The rest do what we can
The Pioneer Village complex comprises 28 buildings on 20 acres housing over 50,000 irreplaceable items of historical value, restored to operating order, arranged in groups and also in the chronological order of their development.
There are 12 historic buildings around the circular "green". There's a Frontier Fort, a real honest-to-goodness Pony Express Station, an Iron Horse, and a home made of sod. There's a general store and a toy store, chock full of all the goods from yesteryear. An original art collection including 25 Currier and Ives prints, 23 Jackson paintings, and the largest single collection of Rogers statues.
You can ride a priceless steam carousel, see 17 historic flying machines and marvel at 100 antique tractors. See the world's oldest Buick, a 1902 Cadillac and a 1903 Ford, both designed by Henry Ford, plus 350 other antique cars, all displayed in their order of development.
